2991321100 has 18 divisors (see below), whose sum is σ = 6491167004. Its totient is φ = 1196528400.

The previous prime is 2991321077. The next prime is 2991321103. The reversal of 2991321100 is 11231992.

It is not an unprimeable number, because it can be changed into a prime (2991321103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14956506 + ... + 14956705.

Almost surely, 2^2991321100 is an apocalyptic number.

2991321100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2991321100 is an abundant number, since it is smaller than the sum of its proper divisors (3499845904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2991321100 is a wasteful number, since it uses less digits than its factorization.

2991321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29913225 (or 29913218 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2991321100 is about 54692.9712120305. The cubic root of 2991321100 is about 1440.8574336642.

The spelling of 2991321100 in words is "two billion, nine hundred ninety-one million, three hundred twenty-one thousand, one hundred".